LM3414MRX/NOPB National Semiconductor, LM3414MRX/NOPB Datasheet - Page 3

• Manufacturer Part Number: LM3414MRX/NOPB
• Description: IC LED DRIVER BUCK 1A 8-PSOP
• Manufacturer: National Semiconductor
• Series: PowerWise®r
• Type: Automotive, High Brightness (HBLED)r

Specifications of LM3414MRX/NOPB

• Constant Current: Yes
• Topology: Low Side, PWM, Step-Down (Buck)
• Number Of Outputs: 1
• Internal Driver: Yes
• Type - Primary: Automotive, General Purpose
• Type - Secondary: High Brightness LED (HBLED)
• Frequency: 250kHz ~ 1MHz
• Voltage - Supply: 4.5 V ~ 42 V
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (0.154", 3.90mm Width) Exposed Pad
• Operating Temperature: -40°C ~ 125°C
• Current - Output / Channel: 1A
• Internal Switch(s): Yes
• Efficiency: 96%
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Output: -

Pin Descriptions
Pin(s)
EP
1
2
3
4
5
6
7
8
PGND
Name
GND
VCC
IADJ
DIM
VIN
FS
EP
LX
Description
Internal Regulator Output Pin
Power Ground Pin
Average Output Current Adjustment Pin
Analog Ground Pin
Switching Frequency Setting Pin
PWM Dimming Control Pin
Drain of N-MOSFET Switch
Input Voltage Pin
Thermal Pad (Power Ground)
3
Application Information
This pin should be bypassed to ground by a ceramic capacitor
with a minimum value of 1µF.
Ground for power circuitry. Reference point for all stated
voltages. Must be externally connected to EP and GND.
Connect resistor R
average output current.
Analog ground connection for internal circuitry, must be
connected to PGND external to the package.
Connect resistor R
switching frequency.
Apply logic level PWM signal to this pin controls the intend
brightness of the LED string.
Connect this pin to the output inductor and anode of the
schottky diode.
The input voltage should be in the range of 4.5V to 42V
(LM3414) or 4.5V to 65V (LM3414HV).
Used to dissipate heat from the package during operation.
Must be electrically connected to PGND external to the
package.
IADJ
FS
from this pin to ground to set the
from this pin to ground to adjust the
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